<?php
/*
   The dual $-sign ($$) in the echo means
   it echoes a variable with the name of the 
   value of $password.
   adding ?password=adminPass to the url would
   make the script echo the value of $adminPass.

*/


   // Not the "real" one :)
   $adminPass  = 'The_Secret_Password_To_Rule_Them_All';
   $password   = $_GET['password']; 
   
   if( $adminPass == $password ) { 
      echo 'Good!';
   } else {
      echo 'The password: ' , $$password, ' was incorrect';
   }
   
?>